Compress image
The image compressor re-encodes pictures at a lower quality setting to cut file size. It is the fastest way to get photos under an upload limit or to lighten a web page.
Drag & drop files here
or Browse files
Max file size: 100 MB
Processed locally in your browser. Files are cleared when you leave the page.
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Why use Compress image?
Images arrive in whichever format the camera, phone or app happened to produce, and that is rarely the format you need next. Converting and resizing lets you meet an upload limit, strip a format a website refuses, keep a transparent background where it matters, or cut a photo from several megabytes down to something an email will accept — without losing the original, which stays untouched on your device.
How to use Compress image
- 1Add the images you want to shrink.
- 2Move the quality slider — lower values mean smaller files.
- 3Press Convert now.
- 4Compare the result and download it.
Features
- Quality control from 20% to 100%.
- Works on multiple images at once.
- No watermark and no size cap on the output.
Supported formats
- Input
- JPG, PNG, WebP and other browser-readable images
- Output
- Compressed image in the same family as the input
Your privacy
This tool runs entirely in your browser using JavaScript and WebAssembly. The file you select is read into your device's memory, converted there and offered back as a download — it is never uploaded to our servers. Closing or reloading the page clears it. If you are signed in, we store only the tool name, the number of files and their total size so you can see your own activity history; the file contents are never sent.
Tips for the best result
- Start from the highest-quality original you have; converting an already-compressed file twice loses detail.
- If you need transparency, keep the output in PNG or WebP — JPG cannot store an alpha channel.
- When resizing for the web, set the width you actually display at rather than shrinking a huge image in CSS.
- Compress last, after cropping and resizing, so you are not re-encoding the same pixels repeatedly.
Frequently asked questions
How much can I compress an image?
Photographs often shrink by 50–80% at 70–80% quality with little visible difference. Graphics with sharp edges degrade sooner.
Is compression reversible?
No. Lossy compression discards data permanently, so keep your originals.
Should I resize as well?
Usually yes. If an image is displayed at 800 px wide there is no benefit in storing it at 4000 px — resize first, then compress.
Are my photos uploaded?
No. The conversion runs in your browser with JavaScript and WebAssembly, so the file never leaves your device and nothing is uploaded to our servers.
Related reading
- How to convert JPG to PDFA step-by-step guide to turning one or more JPG photos into a single PDF document, plus tips on page order, file size and scan quality.
- How to compress a PDF without ruining itWhere PDF file size actually comes from, which compression choices preserve readability, and what to do when a document is still too large.
- JPG vs PNG: which format should you use?A practical comparison of JPG and PNG covering compression, transparency, text sharpness and when each format is the right choice.
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